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#1
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Rebuilding an Inboard
I'm in the home stretch of renovating the structure and interior of my
runabout. The one component that I haven't touched is the motor itself. I have a 1970 427 Crusader. What determines when an engine should be rebuilt? What's involved in rebuilding an inboard? How much would it cost to have it professionally rebuilt? I found this link... http://www.kanter.com/p30-fon.html#fo12 Does this "engine overhaul kit" contain everything for a rebuild? Thanks |
#2
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Rebuilding an Inboard
Is that a marine kit?
G "Douglas St. Clair" wrote in message ... I'm in the home stretch of renovating the structure and interior of my runabout. The one component that I haven't touched is the motor itself. I have a 1970 427 Crusader. What determines when an engine should be rebuilt? What's involved in rebuilding an inboard? How much would it cost to have it professionally rebuilt? I found this link... http://www.kanter.com/p30-fon.html#fo12 Does this "engine overhaul kit" contain everything for a rebuild? Thanks |
#3
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Rebuilding an Inboard
"Douglas St. Clair" wrote in message ... I have a 1970 427 Crusader. What determines when an engine should be rebuilt? Signs that an engine needs rebuilding: Low oil pressure Rod knocks excessive valve noise low compression excessive smoke excessive oil consumption oil leaks What's involved in rebuilding an inboard? Get the engine out of the boat. Then it is just any engine. You will have additional issues about the exhaust manifolds. If the engine needs rebuilding there is a good chance that the manifolds are about to rust out as well. The starter, alternator, distributer and all parts of the fuel system should be "marine". Don't substitute automotive equivalants. How much would it cost to have it professionally rebuilt? Sorry, can't answer that. I found this link... http://www.kanter.com/p30-fon.html#fo12 Does this "engine overhaul kit" contain everything for a rebuild? Well, I don't see "freeze plugs" on the list, and I would certainly recommend replacing them on a marine engine, especially one that was raw water cooled. There are couple that are a real bitch to get to once the engine is all assembled and in the boat, and if they rust out in a year or two you will be really sad that you didn't replace them when it was easy. There will be those who argue that the cylinder head gasket should be "marine" rated, which supposedly makes it more resistant to the continuous flow of raw water. I know lots of people who have used standard automotive gaskets without any problem so this is your call. I would not use a camshaft that was advertised as "high performance" in a boat. You want low end torque, not top end. I certainly wouldn't trade a steady idle for a little more RPMs. Note that you can't order this kit until you have disassembled your motor and completed any boring or grinding that needs to be done. If you need to bore out the cylinders you will need to know how far it has been bored out so you can specify the correct sized pistons. Same with the crankshaft and camshaft, if they need to be ground to get the bearing surfaces round again then you will need oversize bearings that match. If I was spending that much time and effort on the engine I would certainly replace the valves and guides ("deluxe kit"). The disassembly and reassembly of the motor is easy. You will need to find a machine shop that can check/grind the crankshaft, replace the valve guides and grind the valve seats, and clean up and possibly bore out the crankcase. It sure helps a lot if you have an engine stand to hold the engine while you work on it. You will need some sort of crane of A frame over the boat to get the engine out and back in. You might want to consider rebuilding the carburetor while you are at it. Rod |
#4
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Rebuilding an Inboard
Don't believe so. I take it there's a difference?
"Gordon" wrote in message ... Is that a marine kit? G "Douglas St. Clair" wrote in message ... I'm in the home stretch of renovating the structure and interior of my runabout. The one component that I haven't touched is the motor itself. I have a 1970 427 Crusader. What determines when an engine should be rebuilt? What's involved in rebuilding an inboard? How much would it cost to have it professionally rebuilt? I found this link... http://www.kanter.com/p30-fon.html#fo12 Does this "engine overhaul kit" contain everything for a rebuild? Thanks |
#5
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Rebuilding an Inboard
The main difference is that marine kits will have brass freeze plugs. A
small cost either way. A good rebuild will also include having a valve job on the heads, the valve guides checked, the crank turned 10 over and the cylinders bored. You can do the disassembly and reassembly yourself if you are handy. It would be good if you have someone that has done it before and can lend a hand. Estimates for the machine work are easy to get, most machine shops will quote you prices over the phone. You won't save a whole lot over buying a rebuilt though. If there is nothing wrong with your engine I would wait until it needs it myself. Of course that does mean you will be working on it again soon. You never mentioned how many hours are on the engine? "Douglas St. Clair" wrote in message ... Don't believe so. I take it there's a difference? "Gordon" wrote in message ... Is that a marine kit? G "Douglas St. Clair" wrote in message ... I'm in the home stretch of renovating the structure and interior of my runabout. The one component that I haven't touched is the motor itself. I have a 1970 427 Crusader. What determines when an engine should be rebuilt? What's involved in rebuilding an inboard? How much would it cost to have it professionally rebuilt? I found this link... http://www.kanter.com/p30-fon.html#fo12 Does this "engine overhaul kit" contain everything for a rebuild? Thanks |
#6
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Rebuilding an Inboard
Unfortunately I have no idea how many hours are on the engine. It's
original to the boat (1970), and the boat has no hour meter. Funny you mention that about the freeze plugs - I just got back from the auto store where I picked up a couple brass freeze plugs. I've had two pop out over the last two winters. We're not quite sure why - this engine was winterized using the same methods as a half-dozen other inboards. "Lawrence James" wrote in message ink.net... The main difference is that marine kits will have brass freeze plugs. A small cost either way. A good rebuild will also include having a valve job on the heads, the valve guides checked, the crank turned 10 over and the cylinders bored. You can do the disassembly and reassembly yourself if you are handy. It would be good if you have someone that has done it before and can lend a hand. Estimates for the machine work are easy to get, most machine shops will quote you prices over the phone. You won't save a whole lot over buying a rebuilt though. If there is nothing wrong with your engine I would wait until it needs it myself. Of course that does mean you will be working on it again soon. You never mentioned how many hours are on the engine? "Douglas St. Clair" wrote in message ... Don't believe so. I take it there's a difference? "Gordon" wrote in message ... Is that a marine kit? G "Douglas St. Clair" wrote in message ... I'm in the home stretch of renovating the structure and interior of my runabout. The one component that I haven't touched is the motor itself. I have a 1970 427 Crusader. What determines when an engine should be rebuilt? What's involved in rebuilding an inboard? How much would it cost to have it professionally rebuilt? I found this link... http://www.kanter.com/p30-fon.html#fo12 Does this "engine overhaul kit" contain everything for a rebuild? Thanks |
#7
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Rebuilding an Inboard
Perhaps a compression test would be a good place to start. Does it use oil?
Part of the decision is personal, are you looking to make this boat totally low maintenance for few years? Do you take it great distances off shore and reliability is an issue? Is the engine a whole lot easier to remove now than it will be later? How does cost factor in for you? "Douglas St. Clair" wrote in message ... Unfortunately I have no idea how many hours are on the engine. It's original to the boat (1970), and the boat has no hour meter. Funny you mention that about the freeze plugs - I just got back from the auto store where I picked up a couple brass freeze plugs. I've had two pop out over the last two winters. We're not quite sure why - this engine was winterized using the same methods as a half-dozen other inboards. "Lawrence James" wrote in message ink.net... The main difference is that marine kits will have brass freeze plugs. A small cost either way. A good rebuild will also include having a valve job on the heads, the valve guides checked, the crank turned 10 over and the cylinders bored. You can do the disassembly and reassembly yourself if you are handy. It would be good if you have someone that has done it before and can lend a hand. Estimates for the machine work are easy to get, most machine shops will quote you prices over the phone. You won't save a whole lot over buying a rebuilt though. If there is nothing wrong with your engine I would wait until it needs it myself. Of course that does mean you will be working on it again soon. You never mentioned how many hours are on the engine? "Douglas St. Clair" wrote in message ... Don't believe so. I take it there's a difference? "Gordon" wrote in message ... Is that a marine kit? G "Douglas St. Clair" wrote in message ... I'm in the home stretch of renovating the structure and interior of my runabout. The one component that I haven't touched is the motor itself. I have a 1970 427 Crusader. What determines when an engine should be rebuilt? What's involved in rebuilding an inboard? How much would it cost to have it professionally rebuilt? I found this link... http://www.kanter.com/p30-fon.html#fo12 Does this "engine overhaul kit" contain everything for a rebuild? Thanks |
#8
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Rebuilding an Inboard
Perhaps a compression test would be a good place to start. Does it use
oil? Part of the decision is personal, are you looking to make this boat totally low maintenance for few years? Do you take it great distances off shore and reliability is an issue? Is the engine a whole lot easier to remove now than it will be later? How does cost factor in for you? I think that answers my question. The engine will be just as accessible down the road as it is currently. The boat is kept in inland lakes, and probably stays within a couple miles of our dock. How does cost factor in? I just picked up my first designated "towing vehicle" last night... I'd be fine without spending more on the boat at the time being |
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